The Fabrication And Performance Of Micro/Nanomotors In Glucose Solution

The preparation and investigation of micro-and nano-scale devices has attracted increasing attention as a research hotspot.Since the pioneering artificial “autonomous movers” reported by Whitesides' group in 2002,micro/nano-motors are revealed as an emerging field of nanorobotics.However,most such systems use toxic hydrogen peroxide,hydrazine and bromine/iodide as fuels.The resulting cytotoxicity severely hinders the applications in vivo.As a consequence,developing biocompatible micro/nanomotors becomes an important path for bio-application,especially in glucose which is considered as a biocompatible fuel for its abundant existence in biological body.In this work,we prepare two kinds of micro/nano-motors in glucose systems which possess excellent motive performance.At the same time,we prove the locomotive mechanism and different influence factors of micro/nano-motors.In the second chapter,we prepare Cu₂O-Au Janus micromotors.based on the light-induced self-electrophoresis mechanism,the as-prepared Janus micromotors are utilized in the different situations of pure water and dilute glucose solution which demonstrate excellent locomotive performance.This Photocatalytic semiconductor-cuprous oxide of narrow band gap is easily driven under visible light with pushing power by the moving liquid?H+?.Unlike the enzymatic micro-motors powered purely by chemical propulsion in glucose solution,the motion of cuprous oxide micro-motors is easily controlled by repeatable regulation of illumination.This advantage of repeating “go/stop” propulsion control provides the micromotors with potential applications in most flexible situations.At the same time,we investigate the motive characteristics of dual-spheres Cu₂O-Au Janus micromotors which suggest the obvious directional motion performance.The high speed of micromotors in glucose solution and repeating character of visible light indicates promising direction in vivo.In the third chapter,we demonstrate a composite micro/nanomotors.By means of introducing reduced graphene oxide as electronic channel into microspheres,the selfelectrophoresis mechanism is magnified which enhance the electron flow leading to better locomotive performance.In addition,glucose and visible light are utilized to regulate the motion behavior of micromotors indicating a prospective way.beyond this we investigate the surface potential difference of Au-Cu₂O@rGO Janus micromotors at different graphene oxide amount as well as the influence of glucose solution.we prove the moving mechanism of AuCu₂O@rGO Janus composite micromotors and the feasible regulation methods of visible light and glucose.The following research will be focus on the practicle application of this micromotors which is supposed to solve the existing problem in real situation in glucose solution.